Improved Multi-resolution SPIHT Algorithm
Guo Ai-huang · Jisuanji gongcheng · 2008
Since the introduction of wavelet tree and certain pass,SPIHT can achieve high compression ratio as well as high image quality.Later multi-resolution SPIHT is proposed to enable the decoder to select certain resolution as channel condition permits.However,the original algorithm produces repeated comparison and redundant coding in resolution-based sorting,wasting time and increasing complexity when sorting LIP,LIS LSP,tables while updating them at next level.In the paper,a reduced algorithm is introduced to decrease comparison time so as to promote compression rate with high PSNR.Theoretical and simulation analysis indicates that the proposed method can promote the encode speed and the PSNR can be guaranteed.